The **PS11368** is a specialized Integrated Power Module (IPM) primarily used in motor control applications, such as air conditioners, washing machines, and small industrial drives. It is part of the **DIPIPM (Dual-In-line Package Intelligent Power Module)** series, originally developed by Mitsubishi Electric. --- ## 1. Internal Architecture The PS11368 combines power switching elements and control logic into a single package. | Component Type | Description | | :--- | :--- | | **Power Stage** | A 3-phase inverter bridge consisting of 6 IGBTs (Insulated Gate Bipolar Transistors). | | **Drive Circuit** | Integrated gate drivers that convert logic-level signals to the voltages required to switch the IGBTs. | | **Protection Logic** | Built-in circuitry for over-current, under-voltage, and short-circuit protection. | | **Bootstrap Diodes** | High-side drive circuits often include integrated diodes to simplify the external power supply layout. | --- ## 2. Key Specifications These ratings define the electrical limits of the module: * **Voltage Rating:** Typically rated for **600V**, making it suitable for 200V-240V AC line inputs. * **Current Rating:** Rated for **20A** (nominal), though heat sinking is required to maintain this under load. * **Isolation Voltage:** Provides high-voltage isolation (typically 1500Vrms or higher) between the power terminals and the control pins. * **Package Style:** DIP (Dual-In-line Package) with a heat-radiating fin for mounting to a heatsink. --- ## 3. Pin Functional Groups The pins on the PS11368 are generally divided into two functional areas: ### High-Voltage Side (Power) * **P (Positive):** DC link positive input. * **N (Negative):** DC link negative input (often split into three for current sensing). * **U, V, W:** The three-phase AC output terminals connected to the motor. ### Low-Voltage Side (Control) * **UP, VP, WP:** Logic inputs for the high-side IGBTs. * **UN, VN, WN:** Logic inputs for the low-side IGBTs. * **VOT:** Analog temperature output (in some versions) to monitor the module's heat. * **FO:** Fault output pin that signals the microcontroller if a protection event occurs. --- ## 4. Typical Application Circuit When designing with the PS11368, the following external components are usually required: ```mermaid graph LR MCU[Microcontroller] -- PWM Signals --> PS11368 PS11368 -- 3-Phase Power --> Motor[BLDC/Induction Motor] Shunt[Shunt Resistors] -- Feedback --> PS11368 Cap[Bulk Capacitor] -- DC Bus --> PS11368 ``` 1. **Shunt Resistors:** Placed on the N-terminal to sense current for over-current protection. 2. **Bootstrap Capacitors:** Required for the high-side gate drive power supply. 3. **Decoupling Capacitors:** Placed close to the control power supply pins to reduce noise. ---